CN114205881B - Method and equipment for switching between base stations - Google Patents
Method and equipment for switching between base stations Download PDFInfo
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- CN114205881B CN114205881B CN202111674318.4A CN202111674318A CN114205881B CN 114205881 B CN114205881 B CN 114205881B CN 202111674318 A CN202111674318 A CN 202111674318A CN 114205881 B CN114205881 B CN 114205881B
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- 238000000034 method Methods 0.000 title claims abstract description 114
- 230000004044 response Effects 0.000 claims abstract description 65
- 230000007246 mechanism Effects 0.000 claims abstract description 5
- 230000008569 process Effects 0.000 claims description 20
- 230000006870 function Effects 0.000 claims description 19
- 230000001360 synchronised effect Effects 0.000 claims description 18
- 238000012790 confirmation Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 12
- 238000004590 computer program Methods 0.000 claims description 12
- 238000010295 mobile communication Methods 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 6
- 238000010200 validation analysis Methods 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 238000010586 diagram Methods 0.000 description 28
- 230000003993 interaction Effects 0.000 description 8
- 238000007726 management method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
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- 238000012545 processing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000013523 data management Methods 0.000 description 1
- 238000013468 resource allocation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0055—Transmission or use of information for re-establishing the radio link
- H04W36/0077—Transmission or use of information for re-establishing the radio link of access information of target access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
- H04B7/18502—Airborne stations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/10—Access point devices adapted for operation in multiple networks, e.g. multi-mode access points
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Abstract
The application discloses a switching method between base stations, which is used for a switching mechanism between a source base station and a target base station and comprises the following steps: and the first information is stored in a mobile control network element connected with the target base station and is cell switching access control information preconfigured for the target base station. And the source base station interacts a switching request and a switching response with the target base station through the mobile control network element. The switching request is request information for switching the base station, which is sent by the source base station to the target base station; the switching response is response information fed back by the target base station for the switching request, and the switching response comprises the first information and the device applying the method. The method and the device solve the problems of low transmission reliability and large switching time delay of the existing method and device, and are particularly suitable for cell switching between a ground base station and a non-ground base station.
Description
Technical Field
The present disclosure relates to the field of mobile communications technologies, and in particular, to a method and apparatus for handover between base stations.
Background
In conventional mobile communication, when a terminal is handed over from a source base station to a target base station, the source base station is required to initiate a handover request to the target base station, and a handover response is fed back by the target base station. Mobile communication is currently making a non-terrestrial communication standard, i.e. a communication terminal can access a non-terrestrial base station (such as a satellite base station) for communication in addition to accessing a terrestrial base station. When the communication terminal moves out of the coverage area of the ground base station and enters the coverage area of the satellite base station, the switching between the ground base station and the non-ground base station (such as the satellite base station) needs to be performed. The existing switching method between the ground base station and the non-ground base station is characterized in that the wireless link is subjected to interactive switching request and switching response, and the wireless link is affected by an air interface transmission environment, so that the transmission reliability is lower than that of the wired transmission. And if the non-ground base station is far away from the ground, a larger switching time delay is introduced by the wireless link to exchange the switching request and the switching response.
Disclosure of Invention
The application provides a switching method and equipment between base stations, which solve the problems of low transmission reliability and large switching time delay of the existing method and are particularly suitable for cell switching between a ground base station and a non-ground base station.
In a first aspect, the present application proposes a method for handover between base stations, for a handover mechanism between a source base station and a target base station. And the first information is stored in a mobile control network element connected with the target base station and is cell switching access control information preconfigured for the target base station. And the source base station interacts a switching request and a switching response with the target base station through the mobile control network element. The switching request is request information for switching the base station, which is sent by the source base station to the target base station; the switching response is response information fed back by the target base station for the switching request, and the switching response comprises the first information.
Preferably, the first information includes at least one of the following information: cell ID information of the target base station, cell access security configuration information, random access resource configuration information for uplink synchronization.
Preferably, the target base station periodically updates the first information to the mobile control network element.
Preferably, when the target base station indicates the first information to the mobile control network element, the target base station also indicates the valid time or the effective time of the first information.
Further, if the handover between the source base station and the target base station occurs between two mobile control network elements, the source base station interacts the handover request and the handover response with the target mobile control network element through the source mobile control network element; the source mobile control network element is a mobile control network element connected with the source base station, and the target mobile control network element is a mobile control network element connected with the target base station.
Further, if the target base station is correspondingly connected with different mobile control network element agents in different coverage areas, the first information is deployed in the mobile control network element agents, and the mobile control network element connected with the target base station acquires the first information through the mobile control network element agents.
Further, the target base station periodically updates the first information to the mobile control network element proxy.
Preferably, the handover response includes an agent identifier of a mobile control network element agent connected to the target base station.
Preferably, when the source base station sends a handover command to the terminal device, the proxy identifier of the mobile control network element proxy connected with the target base station is indicated in the handover command.
Preferably, the method is for a network device (source base station device), comprising the steps of: transmitting a handover request for a terminal device to the mobile control network element connected to the target base station; and receiving a switching response which is sent by the mobile control network element and contains the first information.
Further, the method further comprises: sending a switching command to terminal equipment; and receiving a terminal equipment context release signaling sent by the mobile control network element.
Preferably, the method is for a network device (target base station device), comprising the steps of: transmitting first information to a mobile control network element connected with a target base station; receiving an uplink synchronous random access process request sent by terminal equipment; and feeding back switching confirmation information aiming at the terminal equipment to the mobile control network element through the ground gateway.
Preferably, the method is used for terminal equipment and comprises the following steps: receiving a switching command sent by a source base station; and sending an uplink synchronous random access process request to the target base station.
Preferably, the method is used for network element equipment and comprises the following steps: receiving and storing first information sent by a target base station; and when a switching request is received, the first information is contained in a switching response to be fed back.
In a second aspect, the present application further proposes a network device (source base station), with a method according to any one of the first aspects of the present application, where at least one module in the network device is handed over between the base stations, for at least one of the following functions: for sending a handover request for the terminal device to a mobile control network element connected to the target base station; and the switching response which is sent by the mobile control network element and contains the first information is received.
In a third aspect, the present application further proposes a network device (target base station), with a method according to any one of the first aspects of the present application, where at least one module in the network device is handed over between the base stations, for at least one of the following functions: transmitting first information to a mobile control network element connected with a target base station; receiving an uplink synchronous random access process request sent by terminal equipment; and feeding back switching confirmation information aiming at the terminal equipment to the mobile control network element through the ground gateway.
In a fourth aspect, the present application further proposes a terminal device, with the method according to any one of the first aspect of the present application, where at least one module in the terminal device is configured to perform at least one of the following functions: receiving a switching command sent by a source base station; and sending an uplink synchronous random access process request to the target base station.
In a fifth aspect, the present application further proposes a network element device, which is a mobile control network element (AMF) connected to a target base station, and with the method according to any one of the first aspects of the present application, at least one module in the inter-base station handover network element device is configured to at least one of the following functions: receiving first information; storing first information; and when a switching request is received, the first information is contained in a switching response to be fed back.
The application also proposes a communication device comprising: a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method according to any one of the embodiments of the first aspect of the present application.
The present application also proposes a computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any one of the embodiments of the first aspect of the present application.
The application also proposes a mobile communication system comprising at least one network device according to any one of the embodiments of the application and/or at least one terminal device according to any one of the embodiments of the application.
The above-mentioned at least one technical scheme that this application embodiment adopted can reach following beneficial effect:
the method is particularly suitable for switching between the ground base station and the non-ground base station, can reduce the relative signaling of interactive switching between the ground base station and the non-ground base station through a wireless link, reduces switching time delay, and better ensures the continuity of switching service between the ground base station and the non-ground base station.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application. In the drawings:
FIG. 1 (a) is a schematic diagram of Xn-based information interaction for an embodiment of a conventional base station connection;
fig. 1 (b) is a schematic diagram of information interaction based on a tunnel or core network element according to an embodiment of the existing base station connection;
FIG. 2 (a) is a schematic diagram of Xn-based information interaction for an embodiment of an inter-base station handover;
fig. 2 (b) is a schematic diagram of information interaction based on a tunnel or core network element in the prior art handover between base stations.
FIG. 3 (a) is a flow chart of an embodiment of the method of the present application;
FIG. 3 (b) is a schematic diagram of a first information update according to an embodiment of the method of the present application;
FIG. 3 (c) is another first information update diagram of an embodiment of the method of the present application;
FIG. 4 (a) is a method flow diagram of an embodiment of the method of the present application for the same AMF;
FIG. 4 (b) is a schematic illustration of an AMF proxy for an embodiment of the present method for the same AMF;
FIG. 5 (a) is a method flow diagram of an embodiment of the method of the present application for a different AMF;
FIG. 5 (b) is a schematic illustration of an AMF proxy for an embodiment of the method of the present application for a different AMF;
FIG. 6 is a schematic diagram of an embodiment of a network device;
FIG. 7 is a schematic diagram of another embodiment of a network device;
fig. 8 is a schematic diagram of an embodiment of a network element device;
FIG. 9 is a schematic diagram of an embodiment of a terminal device;
fig. 10 is a schematic structural diagram of a network device according to another embodiment of the present invention;
fig. 11 is a block diagram of a terminal device according to another embodiment of the present invention.
Detailed Description
For the purposes, technical solutions and advantages of the present application, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The following describes in detail the technical solutions provided by the embodiments of the present application with reference to the accompanying drawings.
FIG. 1 (a) is a schematic diagram of Xn-based information interaction for an embodiment of a conventional base station connection; fig. 1 (b) is a schematic diagram of information interaction based on a tunnel or core network element according to an embodiment of the existing base station connection.
In conventional mobile communications, when a terminal is handed over from a source base station to a target base station, the source base station is required to initiate a handover request to the target base station, and the target base station feeds back a handover response, where the handover response includes access control information for terminal handover, such as a cell ID of the target base station, and information for uplink synchronization of the terminal and the target base station, such as random access resource allocation.
As shown in fig. 1 (a), when the source base station and the target base station are under a mobility control management network element (AMF, access and Mobility Management Function) and the source base station and the target base station have an Xn interface connection, a handover request and a handover response between the source base station and the target base station are transmitted through the Xn interface.
As shown in fig. 1 (b), when the source base station and the target base station have no Xn interface connection, the handover request and the handover response may be interacted through an established secure tunnel or core network element between the source base station and the target base station.
FIG. 2 (a) is a schematic diagram of Xn-based information interaction for an embodiment of an inter-base station handover; fig. 2 (b) is a schematic diagram of information interaction based on a tunnel or core network element in the prior art handover between base stations.
Mobile communication is currently making a non-terrestrial communication standard, i.e. a communication terminal can access a non-terrestrial base station (such as a satellite base station) for communication in addition to accessing a terrestrial base station. When the communication terminal moves out of the coverage area of the ground base station and enters the coverage area of the satellite base station, the switching between the ground base station and the non-ground base station (such as the satellite base station) needs to be performed. If the terminal is handed over from a terrestrial base station to a non-terrestrial base station, then when the inter-cell handoff request and handoff response employ conventional handoff mechanisms, the non-terrestrial base station is required to receive the handoff request from the non-terrestrial base station over a wireless link (e.g., satellite link) and to communicate the handoff response to the terrestrial base station over the wireless link.
As in fig. 2 (a), when the terrestrial base station and the non-terrestrial base station are under one AMF and have an Xn interface connection, the existing method exchanges a handover request and a handover response through a wireless link.
As shown in fig. 2 (b), when the terrestrial base station and the non-terrestrial base station have no Xn interface connection, the existing method exchanges the handover request and the handover response through the wireless link.
Since the wireless link is affected by the air interface transmission environment, transmission reliability is lower than that of wired transmission. And if the non-ground base station is far away from the ground, a larger switching time delay is introduced by the wireless link to exchange the switching request and the switching response. In order to better ensure the continuity of the switching service between the ground base station and the non-ground base station, the switching time delay between the ground base station and the non-ground base station needs to be reduced.
FIG. 3 (a) is a flow chart of an embodiment of the method of the present application; FIG. 3 (b) is a schematic diagram of a first information update according to an embodiment of the method of the present application; fig. 3 (c) is another first information updating schematic diagram according to an embodiment of the method of the present application.
The switching method between base stations specifically comprises the following steps 101-102:
step 101, first information is stored in a mobile control network element connected with the target base station, and is cell switching access control information preconfigured for the target base station.
It should be noted that the present invention is applicable to handover between a source base station and a target base station, and is particularly applicable to handover between a ground base station (source base station) and a non-ground base station (target base station). In the present invention, the source base station may refer to a ground base station, the target base station may refer to a non-ground base station, and the source base station and the target base station may be other base stations, which are not particularly limited herein.
In step 101, the first information includes at least one of the following information: cell ID information of the target base station, cell access security configuration information, random access resource configuration information for uplink synchronization. In an embodiment of the present invention, the first information includes at least one of the following information: cell ID information of a non-terrestrial base station, cell access security configuration information, random access resource configuration information for uplink synchronization of terminal equipment and the non-terrestrial base station, and the like.
Step 102, the source base station interacts with the target base station through the mobile control network element to request and respond to the handover.
The switching request is request information for switching the base station, which is sent by the source base station to the target base station; the switching response is response information fed back by the target base station for the switching request, and the switching response comprises the first information.
In step 102, if a handoff between a terrestrial base station and a non-terrestrial base station occurs within an AMF, first information is stored at the AMF, which refers to a mobile control network element connected to the non-terrestrial base station. As shown in fig. 3 (b), the non-terrestrial base station may periodically send the first information as an update to the AMF.
Preferably, the ground base station sends a handover request to the AMF, and the AMF directly includes the first information in a handover response and feeds back the handover response to the ground base station.
Further, when the non-ground base station indicates the first information to the AMF, the non-ground base station includes the valid time or the effective time of the first information, so as to assist the AMF to select to feed back the stored first information or wait for the update of the first information when feeding back the switching response, and feed back the updated first information.
In step 102, if a handoff between a terrestrial base station and a non-terrestrial base station occurs between two AMFs, a source AMF connected to the terrestrial base station and a target AMF connected to the non-terrestrial base station, respectively, then first information is stored at the target AMF. As in fig. 3 (c), the non-terrestrial base station may periodically send the first information as an update to the target AMF.
The ground base station sends a switching request to the target AMF through the source AMF, and the target AMF directly feeds back the first information contained in the switching response to the ground base station through the source AMF.
Further, when the non-ground base station indicates the first information to the target AMF, the non-ground base station includes the valid time or the effective time of the first information, so as to assist the target AMF to select to feed back the stored first information or wait for the first information to update when feeding back the switching response, and feed back the updated first information. For example, when the target AMF determines that the effective time of the first information is insufficient to support the terminal to initiate random access to the target base station (for example, when the terminal initiates random access to the target base station based on the existing first information, the first information has expired at the target base station), the target AMF may wait for the first information to update, and include the updated first information in the handover response for feedback.
The embodiment of the invention provides a switching mechanism between a ground base station and a non-ground base station, which can reduce the interactive switching related signaling between the ground base station and the non-ground base station through a wireless link, reduce the switching time delay and better ensure the continuity of switching service between the ground base station and the non-ground base station.
Fig. 4 (a) is a method flow chart of an embodiment of the method of the present application for the same AMF, and fig. 4 (b) is an AMF proxy schematic diagram of an embodiment of the method of the present application for the same AMF, which may be used in a handover procedure from a ground base station to a non-ground base station in one AMF, specifically including the following steps 201 to 209:
step 201, after the ground base station performs handover judgment for the terminal device, a handover request for the terminal device is sent to the mobile control network element.
Step 202, the mobile control network element sends a handover response containing the first information to the ground base station.
In step 202, the mobile control network element stores pre-configured cell handover access control information (i.e., the first information) of the non-terrestrial base station, and is used for sending access control information of the target base station to the terminal device when the terminal device performs base station handover.
In step 202, the first information includes cell ID information of the non-ground base station, cell access security configuration information, random access resource configuration information for uplink synchronization of the first terminal with the non-ground base station, and the like.
Preferably, the non-terrestrial base station may periodically send the first information as an update to the mobile control network element.
In step 202, if the terrestrial base station and the non-terrestrial base station are both in the same AMF mobility management, but the non-terrestrial base station is correspondingly connected to different AMF agents (assuming that N AMF agents are connected, the first AMF agent, …, and the nth AMF agent, respectively) due to mobility, as shown in fig. 4 (b).
The AMF agent with which the non-terrestrial base station is most recently deployed may be taken as the target AMF agent, which is one of N AMF agents connected to the non-terrestrial base station.
Preferably, the first information may be deployed in a target AMF agent, and the AMF obtains the first information from the target AMF agent and sends the first information to the ground base station. At this time, the non-terrestrial base station may periodically send the first information as an update to the target AMF agent.
The first information can also be deployed in an AMF, and the non-ground base station periodically updates the first information to the AMF through the target AMF agent and sends the updated first information to the AMF.
Step 203, after receiving the handover response including the first information sent by the AMF, the ground base station sends a handover command to the terminal device, so as to instruct the terminal device to initiate an uplink synchronous random access procedure to the target non-ground base station according to the configuration in the first information.
In step 203, if the non-terrestrial base station is connected to the AMF through the target AMF agent, the agent identification of the target AMF agent is indicated in the handover command.
And 204, the terminal equipment initiates an uplink synchronous random access process to the non-ground base station according to the configuration in the first information.
In step 204, the terminal device initiates an RRC reconfiguration request for cell switching to the non-terrestrial base station in the random access process, the non-terrestrial base station sends an RRC reconfiguration response to the terminal device, and the terminal device sends an RRC reconfiguration complete response to the non-terrestrial base station after receiving the RRC reconfiguration response.
If the non-terrestrial base station is connected with the AMF through the target AMF agent, the proxy identification information of the target AMF agent is indicated in the RRC reconfiguration request information, and the proxy identification information is used for indicating the base station to send a switching confirmation message of the terminal equipment to the AMF through the target AMF agent.
Step 205, after receiving the RRC reconfiguration complete response sent by the terminal device, the non-terrestrial base station sends a handover confirmation message for the terminal device to the terrestrial gateway.
Step 206, the ground gateway feeds back a handover confirmation message for the terminal device to the AMF.
In steps 205 and 206, if the non-terrestrial base station is connected to the AMF through the target AMF agent, a handover confirmation message of the terminal equipment is transmitted to the AMF through the target AMF agent.
Step 207, after the AMF receives the handover confirm message from the terminal equipment of the non-terrestrial base station, the AMF sends a user plane path update request to the user plane packet data management network element (UPF, user Port Function).
Step 208, after the UPF completes the user plane path update, a user plane path update response is fed back to the AMF.
Step 209, after the AMF receives the user plane path update response from the UPF, the AMF sends a terminal device context release signaling to the ground base station.
Fig. 5 (a) is a method flowchart of an embodiment of the method of the present application for different AMFs, and fig. 5 (b) is an AMF proxy schematic diagram of an embodiment of the method of the present application for different AMFs, which may be used for a handoff procedure between two AMFs from a ground base station to a non-ground base station.
In the embodiment of the invention, the ground base station connection is assumed to be a source AMF, the non-ground base station connection is assumed to be a target AMF, the ground base station user plane connection is assumed to be a source UPF, and the non-ground base station connection user plane connection is assumed to be a target UPF.
The inter-base station switching method specifically comprises the following steps 301-310:
step 301, after the ground base station performs handover judgment for the terminal device, a handover request for the terminal device is sent to the target AMF through the source AMF.
Step 302, the source AMF acquires, from the target AMF side, preconfigured cell handover access control information (first information) of the non-terrestrial base station stored in the target AMF side.
In step 303, the source AMF includes the first information in the handover response information and sends the handover response information to the ground base station.
In steps 302 and 303, the first information includes cell ID information of the non-ground base station, cell access security configuration information, random access resource configuration information for uplink synchronization of the first terminal with the non-ground base station, and the like.
The non-terrestrial base station may periodically send the first information as an update to the target AMF.
As shown in fig. 5 (b), if the non-terrestrial base station moves for a mobile reason, different coverage areas are correspondingly connected to different AMF agents (assuming that N AMF agents are connected, the first AMF agent, …, and the nth AMF agent, respectively).
Assume that a ground base station deploys a closest AMF agent as a target AMF agent with reference to a target AMF and the ground base station, the target AMF agent being one of N AMF agents connected to a non-ground base station.
The first information may be deployed in a target AMF agent, and the target AMF obtains the first information from the target AMF agent and sends the first information to the source AMF. At this time, the non-terrestrial base station may periodically send the first information as an update to the target AMF agent.
The first information can be deployed in the target AMF, and the non-ground base station periodically updates the first information to the target AMF through the target AMF agent and sends the updated first information to the target AMF.
Step 304, after receiving the switching response including the first information sent by the source AMF, the ground base station sends a switching command to the terminal device, so as to instruct the terminal device to initiate an uplink synchronous random access procedure to the target non-ground base station according to the configuration in the first information.
In step 304, if the non-terrestrial base station is connected to the target AMF through the target AMF agent, the agent identification information of the target AMF agent is indicated in the handover command.
And 305, the terminal equipment initiates an uplink synchronous random access process to the non-ground base station according to the configuration in the first information.
In step 305, in the random access process, the terminal device initiates an RRC reconfiguration request for cell switching to the non-terrestrial base station, and the non-terrestrial base station sends an RRC reconfiguration response to the first terminal, and after receiving the RRC reconfiguration response, the terminal device sends an RRC reconfiguration complete response to the non-terrestrial base station.
If the non-ground base station is connected with the target AMF through the target AMF agent, the agent identification information of the target AMF agent is indicated in the RRC reconfiguration request information, and the agent identification information is used for indicating the base station to send a switching confirmation message of the terminal equipment to the target AMF through the target AMF agent.
Step 306, after receiving the RRC reconfiguration complete response sent by the terminal device, the non-terrestrial base station feeds back a handover confirmation message for the terminal device to the terrestrial gateway.
Step 307, the ground gateway feeds back a handover confirmation message for the terminal device to the target AMF.
In steps 306 and 307, if the non-terrestrial base station is connected to the AMF through the target AMF agent, a handover confirmation message of the terminal equipment is sent to the target AMF through the target AMF agent.
Step 308, after receiving the handover confirmation message from the terminal device of the non-terrestrial base station, the target AMF completes handover with the source AMF for the N2 interface of the terminal device, that is, the subsequent mobile control about the terminal device will be managed by the N2 interface between the non-terrestrial base station and the target AMF.
Step 309, after the source AMF completes the N2 interface handover related to the terminal device, user plane path update is initiated to the network element managing the user plane data transmission path.
In step 309, the user plane path may be switched from the source UPF, which is responsible for managing packet data transmission of the user plane between the user and the ground base station, to the target UPF, which is responsible for managing packet data transmission of the user plane between the user and the non-ground, by the session management network element SMF.
Step 310, after receiving the user plane path update response from the source UPF, the source AMF sends a terminal device context release signaling to the source ground base station.
Fig. 6 is a schematic diagram of an embodiment of a network device, using a method according to any of the embodiments of the present application, where the network device is configured to: and the source base station.
At least one module in the inter-base station handover network device is configured to perform at least one of the following functions: for sending a handover request for the terminal device to a mobile control network element connected to the target base station; and the switching response which is sent by the mobile control network element and contains the first information is received.
In order to implement the above technical solution, the network device 400 provided in the present application includes a first network sending module 401, a first network determining module 402, and a first network receiving module 403.
The first network sending module is configured to send a handover request for the terminal device to a mobile control network element connected to the target base station.
The first network determining module is used for determining that the ground base station performs switching judgment aiming at the terminal equipment.
The first network receiving module is configured to receive a handover response including the first information sent by the mobile control network element.
Specific methods for implementing the functions of the first network sending module, the first network determining module, and the first network receiving module are described in the embodiments of the methods of the present application, and are not described herein again.
Fig. 7 is a schematic diagram of another embodiment of a network device, using the method of any of the embodiments of the present application, for: and the target base station.
At least one module in the inter-base station handover network device is configured to perform at least one of the following functions: transmitting first information to a mobile control network element connected with a target base station; receiving an uplink synchronous random access process request sent by terminal equipment; and feeding back switching confirmation information aiming at the terminal equipment to the mobile control network element through the ground gateway.
In order to implement the above technical solution, the network device 800 provided in the present application includes a second network sending module 801, a second network determining module 802, and a second network receiving module 803.
The second network sending module is configured to send first information to a mobile control network element connected to a target base station, and is further configured to feed back handover confirmation information for a terminal device to the mobile control network element through a ground gateway.
The second network receiving module is configured to receive an uplink synchronous random access procedure request sent by the terminal device.
The second network determining module is configured to determine the first information, and is further configured to establish a random access procedure with the terminal device according to an uplink synchronous random access procedure request.
Specific methods for implementing the functions of the second network sending module, the second network determining module, and the second network receiving module, as described in the embodiments of the methods of the present application, are not repeated here.
Fig. 8 is an embodiment diagram of a network element device, using the method of any of the embodiments of the present application, for: AMF connected with target base station.
At least one module in the inter-base station handover network element device is configured to at least one of the following functions: receiving first information; storing first information; and when a switching request is received, the first information is contained in a switching response to be fed back.
In order to implement the above technical solution, the network element device 900 provided in the present application includes a network element sending module 901, a network element determining module 902, and a network element receiving module 903.
The network element receiving module is configured to receive first information sent by a target base station.
The network element determining module is configured to store the first information.
And the network element sending module is used for feeding back the first information contained in the switching response to the source base station when the switching request is received.
It should be noted that, the network element device in the embodiment of the present invention is an AMF connected to the target base station, and may be a network device.
Specific methods for implementing the functions of the network element sending module, the network element determining module and the network element receiving module are described in the embodiments of the methods of the present application, and are not described herein again.
Fig. 9 is a schematic diagram of an embodiment of a terminal device.
The application also proposes a terminal device, with the method according to any one of the first aspect of the application, the terminal device is configured to: and implementing the handover between base stations.
At least one module in the inter-base station handover terminal device is configured to at least one of the following functions: receiving a switching command sent by a source base station; and sending an uplink synchronous random access process request to the target base station.
In order to implement the above technical solution, the terminal device 500 provided in the present application includes a terminal sending module 501, a terminal determining module 502, and a terminal receiving module 503.
And the terminal sending module is used for sending an uplink synchronous random access process request to the target base station.
And the terminal determining module is used for establishing an uplink synchronous random access process with the target base station.
And the terminal receiving module is used for receiving the switching command sent by the source base station.
Specific methods for implementing the functions of the terminal sending module, the terminal determining module and the terminal receiving module are described in the embodiments of the methods of the present application, and are not described herein.
The terminal device described in the application may refer to a mobile terminal device.
Fig. 10 shows a schematic structural diagram of a network device according to another embodiment of the present invention. As shown, the network device 600 includes a processor 601, a wireless interface 602, and a memory 603. Wherein the wireless interface may be a plurality of components, i.e. comprising a transmitter and a receiver, providing a means for communicating with various other apparatuses over a transmission medium. The wireless interface performs the communication function with the terminal device, and processes wireless signals through the receiving and transmitting device, and data carried by the signals are communicated with the memory or the processor through the internal bus structure. The memory 603 contains a computer program for executing any of the embodiments of the present application, which computer program runs or changes on the processor 601. When the memory, processor, wireless interface circuit are connected through a bus system. The bus system includes a data bus, a power bus, a control bus, and a status signal bus, which are not described here again.
Fig. 11 is a block diagram of a terminal device according to another embodiment of the present invention. The terminal device 700 comprises at least one processor 701, a memory 702, a user interface 703 and at least one network interface 704. The various components in terminal device 700 are coupled together by a bus system. Bus systems are used to enable connected communication between these components. The bus system includes a data bus, a power bus, a control bus, and a status signal bus.
The user interface 703 may include a display, keyboard, or pointing device, such as a mouse, trackball, touch pad, or touch screen, among others.
The memory 702 stores executable modules or data structures. The memory may store an operating system and application programs. The operating system includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application programs include various application programs such as a media player, a browser, etc. for implementing various application services.
In an embodiment of the present invention, the memory 702 contains a computer program that executes any of the embodiments of the present application, the computer program running or changing on the processor 701.
The memory 702 contains a computer readable storage medium, and the processor 701 reads the information in the memory 702 and performs the steps of the above method in combination with its hardware. In particular, the computer readable storage medium has stored thereon a computer program which, when executed by the processor 701, implements the steps of the method embodiments as described in any of the embodiments above.
The processor 701 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the methods of the present application may be performed by integrated logic circuitry in hardware or instructions in software in processor 701. The processor 701 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, an off-the-shelf programmable gate array or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. In one typical configuration, the device of the present application includes one or more processors (one of CPU, FGAP, MUC), an input/output user interface, a network interface, and memory.
Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Accordingly, the present application also proposes a computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any of the embodiments of the present application. For example, the memory 603, 702 of the present invention may include non-volatile memory in a computer-readable medium, random Access Memory (RAM) and/or non-volatile memory, etc., such as read-only memory (ROM) or flash RAM.
Computer readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of storage media for a computer include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium, which can be used to store information that can be accessed by a computing device. Computer-readable media, as defined herein, does not include transitory computer-readable media (transmission media), such as modulated data signals and carrier waves.
Based on the embodiments of fig. 6 to 11, the present application also proposes a mobile communication system comprising at least 1 embodiment of any one of the terminal devices of the present application and/or at least 1 embodiment of any one of the network devices of the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
The terms "first" and "second" in the present application are used to distinguish between a plurality of objects having the same name, and unless otherwise specified, do not have any particular meaning.
The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and changes may be made to the present application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. which are within the spirit and principles of the present application are intended to be included within the scope of the claims of the present application.
Claims (20)
1. An inter-base station switching method for a switching mechanism between a source base station and a target base station is characterized in that,
first information stored in a mobile control network element connected with the target base station, and cell switching access control information preconfigured for the target base station; the target base station periodically updates the first information to the mobile control network element;
the source base station interacts a switching request and a switching response with the target base station through the mobile control network element;
the switching request is request information for switching the base station, which is sent by the source base station to the target base station; the switching response is response information fed back by the target base station for the switching request, and the switching response comprises the first information.
2. The inter-base station handover method of claim 1, wherein the first information comprises at least one of: cell ID information of the target base station, cell access security configuration information, random access resource configuration information for uplink synchronization.
3. The inter-base station handover method of claim 1, wherein the target base station indicates the validity time or the validation time of the first information at the same time when the target base station indicates the first information to the mobile control network element.
4. The inter-base station handover method of claim 1, wherein if the handover between the source base station and the target base station occurs between two mobile control network elements, the source base station interacts the handover request and the handover response with the target mobile control network element through the source mobile control network element; the source mobile control network element is a mobile control network element connected with the source base station, and the target mobile control network element is a mobile control network element connected with the target base station.
5. The method for switching between base stations according to claim 1 or 4, wherein if a target base station is correspondingly connected to different mobility control element agents in different coverage areas, the first information is deployed in the mobility control element agent, and the mobility control element connected to the target base station obtains the first information through the mobility control element agent.
6. The inter-base station handover method of claim 5, wherein the target base station periodically updates the first information to the mobile control network element agent.
7. The inter-base station handover method according to claim 5, wherein the handover response includes a proxy identification of a mobile control network element proxy connected to the target base station.
8. The inter-base station handover method according to claim 5, wherein when the source base station transmits a handover command to the terminal device, a proxy identification of a mobile control network element proxy connected to the target base station is indicated in the handover command.
9. The inter-base station handover method according to any one of claims 1 to 8, for a source base station apparatus, comprising the steps of:
transmitting a handover request for a terminal device to the mobile control network element connected to the target base station;
and receiving a switching response which is sent by the mobile control network element and contains the first information.
10. The inter-base station handover method of claim 9, further comprising:
sending a switching command to terminal equipment;
and receiving a terminal equipment context release signaling sent by the mobile control network element.
11. The inter-base station handover method according to any one of claims 1 to 8, for a target base station apparatus, comprising the steps of:
transmitting first information to a mobile control network element connected with a target base station;
receiving an uplink synchronous random access process request sent by terminal equipment;
and feeding back switching confirmation information aiming at the terminal equipment to the mobile control network element through the ground gateway.
12. The inter-base station handover method according to any one of claims 1 to 8, for a terminal device, comprising the steps of:
receiving a switching command sent by a source base station;
and sending an uplink synchronous random access process request to the target base station.
13. An inter-base station handover method according to any of claims 1 to 8, for a network element device, comprising the steps of:
receiving and storing first information sent by a target base station;
and when a switching request is received, the first information is contained in a switching response to be fed back.
14. An inter-base station handover network device for implementing the method according to any one of claims 1 to 8,
at least one module in the inter-base station handover network device is configured to perform at least one of the following functions: for sending a handover request for the terminal device to a mobile control network element connected to the target base station; and the switching response which is sent by the mobile control network element and contains the first information is received.
15. An inter-base station handover network device for implementing the method according to any one of claims 1 to 8,
at least one module in the inter-base station handover network device is configured to perform at least one of the following functions: transmitting first information to a mobile control network element connected with a target base station; receiving an uplink synchronous random access process request sent by terminal equipment; and feeding back switching confirmation information aiming at the terminal equipment to the mobile control network element through the ground gateway.
16. An inter-base station handover terminal device for implementing the method according to any one of claims 1-8, characterized in that,
at least one module in the inter-base station handover terminal device is configured to at least one of the following functions: receiving a switching command sent by a source base station; and sending an uplink synchronous random access process request to the target base station.
17. An inter-base station handover network element device for implementing the method according to any one of claims 1 to 8, characterized in that,
at least one module in the inter-base station handover network element device is configured to at least one of the following functions: receiving first information; storing first information; and when a switching request is received, the first information is contained in a switching response to be fed back.
18. A communication device, comprising: memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor performs the steps of the method according to any one of claims 1 to 13.
19. A computer readable medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method according to any of claims 1 to 13.
20. A mobile communication system comprising an inter-base station handover network device according to claim 14, an inter-base station handover network device according to claim 15, an inter-base station handover terminal device according to claim 16 and/or a network element device according to claim 17.
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